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Originally posted by alexs
reply to post by Raivan31
the orbit of the moon coincides with its rotation yes it does rotate
yet we only see one side of the Moon
no other known planetary body does this ...
Originally posted by Raivan31
reply to post by watchZEITGEISTnow
I've always thought it was remarkably strange that the moon always shows one face to the earth and never the other side... just seems highly improbable to me.
Originally posted by watchZEITGEISTnow
Originally posted by alexs
reply to post by Raivan31
the orbit of the moon coincides with its rotation yes it does rotate
yet we only see one side of the Moon - no other known planetary body does this ...
Now why do you think that is?
Most significant moons in the Solar System are tidally locked with their primaries, since they orbit very closely and tidal force increases rapidly (as a cubic) with decreasing distance.
Notable exceptions are the irregular outer satellites of the gas giant planets, which orbit much farther away than the large well-known moons.
List of known tidally locked bodies
[edit] Solar System
Locked to the Sun
Mercury (in a 3:2 rotation: orbit resonance)
Locked to the Earth
Moon
Locked to Mars
Phobos
Deimos
Locked to Jupiter
Metis
Adrastea
Amalthea
Thebe
Io
Europa
Ganymede
Callisto
Locked to Saturn
Pan
Atlas
Prometheus
Pandora
Epimetheus
Janus
Mimas
Enceladus
Telesto
Tethys
Calypso
Dione
Rhea
Titan
Iapetus
Locked to Uranus
Miranda
Ariel
Umbriel
Titania
Oberon
Locked to Neptune
Proteus
Triton
Locked to Pluto
Charon (Pluto is itself locked to Charon)
Originally posted by Saytan75
yet we only see one side of the Moon
The moon is Tidally locked to the Earth which is why we only see one face, it rotates on its axis once every orbit of the Earth
no other known planetary body does this ...
Right...all apart from Phobos and Deimos.
...and Metis, Adrastea, Amalthea, Thebe, Io, Europa, Ganymede, Callisto, Pan, Atlas, Prometheus, Pandora, Epimetheus, Janus, Mimas, Enceladus, Telesto, Tethys, Calypso, Dione, Miranda, Ariel, Umbriel, Titania, Oberon, Proteus and Triton.
Tidal Locking
They rotate on their side too do they? News to me.